function change2(o) {
  s1.className = "";
  s2.className = "";
  s3.className = "";
  s4.className = "";
  s5.className = "";
  
  //document.all("keyword").value = "";
  
  spanArea.style.display = "none";
  spanSoftCatalog.style.display = "none";
  spanArticleCatalog.style.display = "none";
  spanProductCatalog.style.display = "none";
  document.all('selSearchType').value = o;
        
  switch(o) {
    case "s1"://搜索培训课程
    {
      document.searchForm.search_type.value = "course";
      spanArea.style.display = "inline";
      s1.className = "searchonline";
      s_detail.style.background = "#d2e4fc";
      break;
    }
    case "s2"://搜索文章
    {
      document.searchForm.search_type.value = "article";
      spanArticleCatalog.style.display = "inline";
      s2.className = "searcharticle";
      s_detail.style.background = "#C4DF9B";
      break;
    }
    case "s3"://搜索资料
    {
      document.searchForm.search_type.value = "soft";
      spanSoftCatalog.style.display = "inline";
      s3.className = "searchcourse";
      s_detail.style.background = "#FFBABA";
      break;
    }

    case "s4"://搜索机构
    {
      document.searchForm.search_type.value = "organ";
      spanArea.style.display = "inline";
      s4.className = "searchorgan";
      s_detail.style.background = "#ECC4FF";
      break;
    }
    
    case "s5"://搜索产品
    {
      document.searchForm.search_type.value = "product";
      spanProductCatalog.style.display = "inline";
      s5.className = "searchproduct";
      s_detail.style.background = "#FDF7B1";
      break;
    }
  }
  
  document.searchForm.keyword.focus();
}



function chkSearch() {
  var keyword = trim(document.searchForm.keyword.value);
  document.searchForm.keyword.value = keyword;
  var classarea = document.searchForm.classarea.value;
  var search_type = document.searchForm.search_type.value;
  var url = "";

  if(keyword == "") {
    alert("请输入搜索关键字！");
    return false;
  }

  if(search_type == "organ") {
  	url = "/train/ListCompany.asp?catalog=search&value=" + classarea + "&SearchText=" + keyword;
  	document.searchForm.action = url;
  }
  else {
    url = "/Search_Soft.asp";
  	document.searchForm.action = url;
  }
}

function trim(inputString) {

if (typeof inputString != "string") { return inputString; }
var retValue = inputString;
var ch = retValue.substring(0, 1);
while (ch == " ") { 
  //检查字符串开始部分的空格
  retValue = retValue.substring(1, retValue.length);
  ch = retValue.substring(0, 1);
}
ch = retValue.substring(retValue.length-1, retValue.length);
while (ch == " ") {
 //检查字符串结束部分的空格
 retValue = retValue.substring(0, retValue.length-1);
 ch = retValue.substring(retValue.length-1, retValue.length);
}
while (retValue.indexOf("  ") != -1) { 
 //将文字中间多个相连的空格变为一个空格
 retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); 
}
return retValue;
}